This has been a great app for keeping track of periods, and predicting my flows.
I am 31 years old and have never had a regular flow cycle. I have been on birth control since I was 12, to try to control my cycle and the very heavy flows. I stopped birth control when I got married, but have not had luck getting pregnant. I have been using this to try to predict the best times to try.
Bowlnnrd11 about Period Tracker , v3.0.0